The tooth surface was prepared for adhesion by applying a three step etch and rinse adhesive. After removal of excess resin, all restorations were cemented using a resin cement Variolink II . light-cured for 40s on each surface (lingual, labial, mesial, distal) (Astralis 10, SN 018766, Ivoclar Vivadent, light output: 1200 mW/cm2). Static and dynamic occlusion was adjusted using fine grit diamond burs. The power output of the unit was measured with a radiometer ( before the placement of each restoration. After polymerization, restoration margins were finished. Occlusion was adjusted with fine diamond burs (60- and 40-µm grit) and finally, the restoration was polished with pointed silicon polishers and abrasive polishing brushes. Patients received individual instructions to maintain plaque control.